Johnston, L. D. (1985). Use of licit and illicit drugs by America's high school students, 1975 - 1984. DHHS publication.
Chicago-Zitierstil (17. Ausg.)Johnston, Lloyd D. "Use of Licit and Illicit Drugs by America's High School Students, 1975 - 1984." DHHS Publication 1985.
MLA-Zitierstil (8. Ausg.)Johnston, Lloyd D. "Use of Licit and Illicit Drugs by America's High School Students, 1975 - 1984." DHHS Publication, 1985.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.